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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2020-02-28 16:17:16 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2020-02-29 01:03:49 +0300 |
| commit | 9a40bddd47ca4aa26d3b10bdaf51c35862a344ff (patch) | |
| tree | e49b94e95330b83ede6671f870df0941efab6ef4 /drivers/gpu/drm/i915/Kconfig.profile | |
| parent | db3d8338bacbfc734d246eaccfbe5b19ad81d7d4 (diff) | |
| download | linux-9a40bddd47ca4aa26d3b10bdaf51c35862a344ff.tar.xz | |
drm/i915/gt: Expose heartbeat interval via sysfs
We monitor the health of the system via periodic heartbeat pulses. The
pulses also provide the opportunity to perform garbage collection.
However, we interpret an incomplete pulse (a missed heartbeat) as an
indication that the system is no longer responsive, i.e. hung, and
perform an engine or full GPU reset. Given that the preemption
granularity can be very coarse on a system, we let the sysadmin override
our legacy timeouts which were "optimised" for desktop applications.
The heartbeat interval can be adjusted per-engine using,
/sys/class/drm/card?/engine/*/heartbeat_interval_ms
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Steve Carbonari <steven.carbonari@intel.com>
Tested-by: Steve Carbonari <steven.carbonari@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200228131716.3243616-7-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/Kconfig.profile')
| -rw-r--r-- | drivers/gpu/drm/i915/Kconfig.profile | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/Kconfig.profile b/drivers/gpu/drm/i915/Kconfig.profile index 1f4e98a8532f..ba8767fc0d6e 100644 --- a/drivers/gpu/drm/i915/Kconfig.profile +++ b/drivers/gpu/drm/i915/Kconfig.profile @@ -20,6 +20,9 @@ config DRM_I915_HEARTBEAT_INTERVAL check the health of the GPU and undertake regular house-keeping of internal driver state. + This is adjustable via + /sys/class/drm/card?/engine/*/heartbeat_interval_ms + May be 0 to disable heartbeats and therefore disable automatic GPU hang detection. |